J/ApJ/869/157ivo://CDS.VizieR/J/ApJ/869/157doi:10.26093/cds/vizier.18690157CDSCarpenter K.G.Nielsen K.E.Kober G.V.Ayres T.R.Wahlgren G.M.Rau G.2021-01-06T09:04:10Z2020-03-04T09:42:54ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frm-starsgiant-starssupergiant-starslate-type-starsspectroscopyultraviolet-astronomyspectral-energy-distributionradial-velocityThe Hubble Space Telescope (HST) Treasury Program Advanced Spectral Library Project: Cool Stars was designed to collect representative, high-quality UV spectra of eight evolved F-M type cool stars. The Space Telescope Imaging Spectrograph (STIS) echelle spectra of these objects enable investigations of a broad range of topics, including stellar and interstellar astrophysics. This paper provides a guide to the spectra of the two evolved M stars, the M2 Iab supergiant {alpha}Ori and the M3.4 giant {gamma}Cru, with comparisons to the prototypical K1.5 giant {alpha}Boo. It includes identifications of the significant atomic and molecular emission and absorption features and discusses the character of the photospheric and chromospheric continua and line spectra. The fluorescent processes responsible for a large portion of the emission-line spectrum, the characteristics of the stellar winds, and the available diagnostics for hot and cool plasmas are also summarized. This analysis will facilitate the future study of the spectra, outer atmospheres, and winds, not only of these objects but of numerous other cool, low-gravity stars, for years to come.2018ApJ...869..157Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/869/157CatalogResearchIsServedByTAP VizieR generic servicerelated-toIII/124 : Spectrophotometry of 60 stars (Kiehling, 1987)III/186 : Energy distribution in stars at 320-760 nm (Knyazeva+, 1996)J/A+A/177/131 : CaII & MgII excess flux density in cool stars (Rutten, 1987)J/AZh/73/762 : Energy distribution giants & supergiants (Tereshchenko, 1996)J/A+A/326/249 : Chromospheric models of dwarf M stars (Mauas+ 1997)J/A+A/430/303 : MgII-K line fluxes cool active & quiet stars (Cardini+, 2005)J/A+A/439/1137 : PHOENIX model chromospheres of M dwarfs (Fuhrmeister+, 2005)J/A+A/469/309 : Chromospheric activity in late-type stars (Cincunegui+, 2007)J/AJ/135/1117 : Spectroscopic study of red giants in M15 (Meszaros+, 2008)J/A+A/514/A97 : High-resolution spectra Late-type stars (Lopez-Santiago+2010)J/MNRAS/414/418 : Chromospheric Mg II h+k flux of evolved stars (Perez+, 2011)J/MNRAS/471/770 : Parameters & IR excesses of Gaia DR1 stars (McDonald+, 2017)J/A+A/616/A108 : Cool stars chromospheric activity (Boro Saikia+, 2018)http://casa.colorado.edu/~ayres/ASTRAL/ : ASTRAL webpagehttp://archive.stsci.edu/prepds/astral/ : MAST ASTRAL webpagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/869/157https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/869/157http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/869/157https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/869/157https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/869/157http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/869/157GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapUVdefaultJ/ApJ/869/157/table1HST/STIS ASTRAL observations for {alpha}Ori and {gamma}CruExp[1862/17751] Exposition timestime.duration;obs.exposureintGratingInstrument grating (E140M, E230M or E230H)meta.id;instrcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTargetObserved star (1)meta.id;meta.maincharlambda[1425/2762] Observation's wavelength ({lambda}_c_) in {AA} units0.1nmem.wlintApSize of aperturearcsecphys.angSize;instr.fovcharlam0[1150/2865] Minimum spectral coverage in {AA} units0.1nminstr.bandwidthintlam1[1700/3118] Maximum spectral coverage in {AA} units0.1nminstr.bandwidthintJD[5599/5781] Mean julian date; starting time of the first segment in the observing sequence (JD-2550000)dtime.epochdoubleSimbadSimbad column added by the CDSmeta.ref.urlcharJ/ApJ/869/157/table7Properties of fluorescent emission lines in STIS spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambda[1196/2858] Laboratory wavelength, vacuum, Angstroms (G1)0.1nmem.wldoubleLineAtomic and molecular line (G1)meta.id;spect.linecharloggf[-8.2/0.8]? log, statistical weight*oscillator strength (G1)stat.weight;phys.atmol.oscStrengthdoublenullableEup[42533/107721] Energy, upper (G1)cm**-1phys.energy;stat.maxintRV-gcru[-17.8/13.2]? Radial velocity, {gamma}Cru, relative to the stellar RV of 20.6km/skm/sphys.veloc;arith.difffloatnullableFWHM-gcru[9/99]? Full width at half maximum, {gamma}Crukm/sspect.line.widthintnullableLFint-gcru[1.7/4064]? Integrated line flux observed at Earth, {gamma}Cru, 10-15erg/s/cm21e-15mW.m**-2phot.fluxfloatnullableLFs-gcru[0.7/1508]? Integrated line flux at the surface of {gamma}CrumW.m**-2phot.fluxfloatnullableRV-aori[-16.5/17.6]? Radial velocity, {alpha}Ori relative to the stellar RV of 20.6km/skm/sphys.veloc;arith.difffloatnullableFWHM-aori[10/82]? Full width at half maximum, {alpha} Orikm/sspect.line.widthintnullableLFint-aori[0.6/15085]? Integrated line flux observed at Earth, {alpha} Ori, 10-15erg/s/cm21e-15mW.m**-2phot.fluxfloatnullableLFs-aori[0.1/2048]? Integrated line flux at the surface of {alpha} OrimW.m**-2phot.fluxfloatnullableJ/ApJ/869/157/table8Properties of chromospheric and wind lines in the {gamma}Cru ASTRAL spectrumFWHM-abs1[7/921]? absorption line 1 FWHMkm/sspect.line.widthintnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambda[1244/2870] Laboratory wavelength, vacuum, Angstroms (G1)0.1nmem.wldoubleLineAtomic and molecular line (G1)meta.id;spect.linecharloggf[-8.17/0.54] log, statistical weight*oscillator strength (G1)stat.weight;phys.atmol.oscStrengthfloattau-lte[-7.8/0.8] LTE opacity ({tau}_LTE_)phys.absorption.coefffloatElow[0/56371] Energy, lower (G1)cm**-1phys.energy;stat.minintEup[35051/105654] Energy, upper (G1)cm**-1phys.energy;stat.maxintRV-em[-25.9/14.7]? Radial velocity, emission line, relative to the stellar RV of 20.6km/skm/sphys.veloc;arith.difffloatnullableRV-abs1[-20.3/32.7]? Radial velocity, absorption line 1, relative to the stellar RV of 20.6km/skm/sphys.veloc;arith.difffloatnullableRV-abs2[-31.2/5.2]? Radial velocity, absorption line 2, relative to the stellar RV of 20.6km/skm/sphys.veloc;arith.difffloatnullableFWHM-em[8/64]? emission line full width at half maximumkm/sspect.line.widthintnullableFWHM-abs2[10/34]? absorption line 2 FWHMkm/sspect.line.widthintnullableLFint[1/23452]? integrated emission line flux observed at Earth, 10-15 erg/s/cm21e-15mW.m**-2phot.fluxfloatnullableLFs[0.4/8767.5]? integrated emission line flux observed at the stellar surface, erg/s/cm2mW.m**-2phot.fluxfloatnullableEW1[0/150.4]? Equivalent width, absorption line 1, in {AA} units0.1nmmeta.unit;spect.line.eqWidthfloatnullableEW2[0/86]? Equivalent width, absorption line 2, in {AA} units0.1nmmeta.unit;spect.line.eqWidthfloatnullableJ/ApJ/869/157/table9Properties of chromospheric and wind lines in the {alpha}Ori ASTRAL spectrumrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambda[1245/2882] Laboratory wavelength, vacuum, {AA} (G1)0.1nmem.wldoubleLineAtomic and molecular line (G1)meta.id;spect.linecharloggf[-8.2/0.6]? log, statistical weightXoscillator strength (G1)phys.atmol.collStrengthfloatnullabletau-lte[-9/0.8]? LTE opacity ({tau}_LTE_)phys.absorption.coefffloatnullableElow[0/83136]? Energy, lower, cm-1 (G1)cm**-1phys.energy;stat.minintnullableEup[35051/127612]? Energy, upper, cm-1 (G1)cm**-1phys.energy;stat.maxintnullableRV-em[-31.8/36.1]? Radial velocity, emission line, relative to the stellar RV of 20.6km/skm/sphys.veloc;arith.difffloatnullableRV-abs1[-43.9/18.8]? Radial velocity, absorption line 1, relative to the stellar RV of 20.6km/skm/sphys.veloc;arith.difffloatnullableRV-abs2[-21.1/38.6]? Radial velocity, absorption line 2, relative to the stellar RV of 20.6km/skm/sphys.veloc;arith.difffloatnullableFWHM-em[15/101]? emission line full width at half maximumkm/sspect.line.widthintnullableFWHM-abs1[5/57]? absorption line 1 FWHMkm/sspect.line.widthintnullableFWHM-abs2[6/96]? absorption line 2 FWHMkm/sspect.line.widthintnullableLFint[0.3/84247.2]? integrated emission line flux observed at Earth, 10-15erg/s/cm21e-15mW.m**-2phot.fluxfloatnullableLFs[0.1/11572.4]? integrated emission line flux observed at the stellar surface, erg/s/cm2mW.m**-2phot.fluxfloatnullableEW1[0/46.1]? Equivalent width, absorption line 1, in {AA} units0.1nmmeta.unit;spect.line.eqWidthfloatnullableEW2[0/21.4]? Equivalent width, absorption line 2, in {AA} units0.1nmmeta.unit;spect.line.eqWidthfloatnullable